Āl ‘Imrān

بَلَى مَنْ أَوْفَى بِعَهْدِهِ وَاتَّقَى فَإِنَّ اللّهَ يُحِبُّ الْمُتَّقِينَ

76. "Yes, whoever fulfils his promise and guards (against evil) -then, verily Allah loves the pious ones."

The command in this verse is: to stand firm and be steadfast before wrong ideas.
By the way, to keep one's word and fulfil the promise with virtue is the main cause to call the love of Allah, not only being the People of the Book with a bare pretension.